NEA 1-hour PM2.5 readings (Singapore)

The official hourly concentration of fine particles (PM2.5, µg/m³) for Singapore's five regions, published by NEA. It is the reading most sports organisers and schools use for same-day decisions.

Publisher: National Environment Agency (NEA), Singapore
What it measures: PM2.5 concentration in µg/m³ for the North, South, East, West and Central regions, grouped into four bands: Normal 0–55, Elevated 56–150, High 151–250, Very High 251+.
Update frequency: Hourly. The reading for an hour is typically published within the following hour.
Coverage: Singapore only (five regions).
How we use it: Haze Guide uses it as the headline figure for Singapore pages, picks the NEA region closest to a visitor's location, and shows the past 24 hours from the same API.
Limitations: Regional values are not street-level. Region boundaries are approximated from NEA's label locations. A reading describes the past hour, not the next one.
Terms: Published under the Singapore Open Data Licence; attribute NEA / data.gov.sg.
Official site: https://www.haze.gov.sg/resources/1-hr-pm2.5-readings
API / docs: https://api-open.data.gov.sg/v2/real-time/api/pm25
Our JSON endpoint: https://haze.day/api/now?place=sg

Live example

Reading time 2026-10-11 10:00 (Singapore time)

	North	South	East	West	Central
PM2.5 (1 h)	68	98	84	98	100

Singapore now · as at 10:00 SGT

100 µg/m³ · Elevated (1-hour PM2.5, NEA official, worst region)

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General information, not medical advice. Follow your doctor and your school, league or organiser's final call. Data come from official sources; see data sources.